Circular-saw machine.



W. H. HARDING.

CIRCULAR SAW MACHINE.

APPLICATION FILED MAY 25, 1915.

1,215,527. Patented Feb. 13, 1917.

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CIRCULAR SAW MACHINE.

APPLICATION FILED MAY 25. I915.

1,215,527. Patented Feb. 13,1917,

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UNTED STATES TE T QFFTC.

WILBERT H. HARDING, OF FORT WAYNE, INDIANA.

CIRCULAR-SAW MACHINE.

Application filed May 2-5, 1915.

To all whom it may concern:

Be it known that I, lVILnERr H. HARDING, a citizen of the United States,residing at Fort lVayne, in the county of Allen and State of Indiana,have invented certain new and useful Improvements in Circular-SawMachines, of which the following is a specification.

My invention relates to saws, and more particularly to a new andimproved circular saw and controlling mechanism therefor.

The primary object of my invention is to provide an improved circularsaw particularly adapted for metal work, such as cutting metal rods,tubes, and the like.

'Another object of my invention is to provide an improved work holderfor use in connection with my improved circular saw.

A further object of my invention is to provide improved means forcontrolling the saw, as well as means for automatically withdrawing thesame from operative position.

A still further object of my invention is to provide a new and improvedgage for use in connection with my improved saw.

With the above and other objects in view my invention resides preferablyin the construction, combination, and arrangement of parts ashereinafter set forth in the specification and illustrated in theaccompanying drawings, in which Figure 1 is a side elevation of a sawconstructed in accordance with the preferred embodiment of my invention.

Fig. 2 is a front elevation of the same.

Fig. 3 is a top plan view of the same.

Similar reference characters indicate similar parts throughout thevarious views of the drawings.

Referring more particularly to the drawings, in which the preferredembodiment of my invention is illustrated, I provide a base 1 having theopposite sides thereof enlarged as indicated at 2 and 3 for a purposewhich will hereinafter appear. A rearwardly extending arm a formedintegral with the base 1 is provided, said arm 4 having the free eX-tremity thereof bent upwardly to provide a supporting bracket 5 for apurpose which will hereinafter appear.

The portions 2 and 8 of the base 1 are provided with upstanding ears 6and 7, respectively, which serve as bearings for a transverse supportingshaft 8. As shown to ad Specification of Letters Patent.

Patented Feb. 13, 1917. Serial No. 30,381.

vantage inFigs. 1 and 3 these bearings 6 and 7 are disposed on the rearends of the enlarged portions 2 and 3 and substantially intermediate thelength of the base 1 and arm 1.

The forward ends of the enlarged portions 2 and 3 are provided withupstanding pedestals 9 and 10, respectively, said pedestals beingadapted to support a V-shaped trough 11 which serves as a work holder.

The saw carrying frame is designated generally by the numeral 12 andcomprises a substantially U-shaped body having a handle portion 12 andsupporting rocking arms 13 and 14. The supporting arms'13 and 14 areenlarged on their lower extremities as at 15 and 16 andare provided withtransversely extending openings through which the shaft 8 is adapted topass. The shaft 8 is preferably stationary and is secured in position bya set screw 17. The arms 13 and 1d are enlarged adjacent the handle 12to provide bearing portions 18 and 19 in which a driven shaft 20 isjournaled for rotation. A circular saw 21 of any approved type may bemounted on one of the extremities of the shaft 20, said shaft-beingprovided with an enlarged portion 22, and a locking nut 23. The nut 23is adapted to engage the saw 21 and retain the same in position betweensaid nut and the enlarged portion 22. The opposite extremity of theshaft 20 has mounted thereon a grooved pulley 2-1. A strengthening web25 extends transversely of the frame 12 between the arms 13 and 1-1- andis preferably formed integral therewith. The transverse strengtheningweb is enlarged, at the point 26 substantially intermediate its lengthfor a purpose which will hereinafter appear.

I have provided means for imparting rotary motion to the saw 21 whichincludes a driving pulley 27 mounted freely on the shaft 8, said pulley27 having another pulley 28 formed integral therewith. Motion isimparted to the shaft 20 from the pulley 27 through the medium of a belt29 or the like, said belt being trained over the pulleys 24 and 27, asshown to advantage in Figs. 1 and 2. In order to maintain the pulleys 27and 28 in alinement an enlarged portion 30 is provided on the base 1 anda retaining washer, collar or the like 31 is carried by the shaft 8,said enlarged portion 30 and collar 31. serving to prevent longitudinalmovementof the pulleys 27 and 28 on the shaft 8. Any suitable source ofmotive power may be applied to the pulley 28.

A retractile spring 32 is connected at one of its extremities to the sawcarrying frame as indicated at 33, the opposite extremity of said springbeing connected as at 3st to the upper extremity of the supportingbracket Means for rocking the saw frame is provided which includes arope, chain or the like 35 connected to the enlarged portion 26 of thestrengthening web 25 and trained over a pulley 36 supported in bracketarms 37 from one of the under faces of the work support 11. The freeextremity of the operating medium is connected to a foot pedal 38 of anydesired form.

I have provided a simple and improved gage which is carried by thesupporting pedestals 9 and 10 and includes a rod 39 ad justable tovarious lengths relative to the work holder 11. The rod 89 is secured ina desired position by a set screw %0 mounted in the pedestal 9. Oneextremity of the rod 39 carries an enlargement and comprises a plate,disk ll or the like, against which material to be cut is adapted toabut. The rod, if so desired, may be graduated with a scale of any kind.

From the above description taken in connection with theaccompanyingdrawings, itis thought that a clear and comprehensiveunderstanding of the construction, operation, and advantages of myinvention may be readily gathered. It will be noted that when i isdesired to cut a metal rod, pipe, or the like, the same may be depositedon the work holder 11. The gage ll may now be set to the desiredposition and the work moved to abut the same. Applying power to thedriving mechanism of the saw, the same will be revolved in the properdirection. By depressing the foot pedal 38 the saw-carrying frame may bemade to rock to the dotted line position shown in Fig. l, whereupon thecutting edge of the saw will be brought into engagement with the work,quickly and accurately, severing that portion of the same which extendsbeyond the terminal of the work holder. The saw 21 is so disposedrelative to the terminal of the work holder 11 that, when the same ismoved into the position shown in dotted lines in Fig. 1, the inner facethereof will very nearly engage the terminal of the work holder 11 sothat a clean accurate cut may be assured. If it is desired to rock thesaw frame by hand instead of by the foot pedal,

the handle 12 may be readily grasped andthe saw operated thereby. Itwill be noted that the shaft 8 serves both as a supporting bearingmember for the frame and as a Copies of this patent may be obtained forfive cents each, by addressing the Commissioner of Patents,

bearing shaft for the driving pulleys 27 and 2-8.

While I have shown and described my invention as possessing a peculiarform and construction, it is desired that it be understood that I maymake such changes in the details thereof that do not depart from thespirit and scope of the invention as claimed.

Having thus described my invention what I claim and desire to secure byLetters Patent is:

1. In a circular saw machine, a base having a frame pivotally mountedthereon, a saw shaftin said frame, a driving shaft on sa id base aboutwhich said frame is adapted to rock, a strengthening web on said frame,and means connected to said web for rocking said frame to move the sawinto opera tive position.

2. In a circular saw machine, a base haw ing a frame pivotally mountedthereon, a driving shaft on said frame carrying a circular saw, adriving shaft on the base about which said frame is adapted to rock, astrengthening web on said frame, a flexible connection fixed to saidweb, and means secured to the free end of said flexible connection forrocking the frame to move the saw into operative position. r

3. The combination with a circular saw machine including a base having arocking frame thereon, a saw shaft in said frame, a driving shaft onsaid base about which the frame is adapted to rock, a work-holder andguide carried by the base formed of substantially V-shaped figuration, aplurality of standards formed on said base for supporting saidwork-holder, and means for rocking the frame to move the saw intooperative position.

l. The combination with a circular saw machine including a base having arocking frame thereon, a saw shaft in said frame, a driving shaft onsaid base about which said frame is adapted to rock, a strengthening webon said frame, a work-holder and guide carried by the base formed ofsubstantially V-shaped figuration, a plurality of standards formed onsaid base for supporting said work-holder, means connected with said webfor rocking the frame to move the saw into operative position, andspring means connected with the frame and with the base for returningsaid ,frame to inoperative position.

In testimony whereof I aflix my signature in presence of two witnesses.

v VVILBERT H. HARDING.

lVitnesses L. D. Gnonoxnn, R. F. Ronnnn.

Washington, D. C.

